Game Specific Installation?

If I had three files and I wanted to use one tp2 file to install each one to a separate game what is the best way?

BEGIN ~my mod~

ACTION_IF GAME_IS ~bgee~ THEN BEGIN // bgee engine check
ACTION_IF FILE_EXISTS_IN_GAME ~enginest.2da~ BEGIN // possibly redundant?

File 1...

ACTION_IF FILE_EXISTS_IN_GAME ~bdcru112.cre~ THEN BEGIN // sod specific file

File 2...

ACTION_IF GAME_IS ~bg2ee~ THEN BEGIN // bg2ee engine check
ACTION_IF FILE_EXISTS_IN_GAME ~enginest.2da~ BEGIN // possibly redundant?

File 3...

The problem is I don't want File 1 or 3 installed in SoD just File 2...